Messages in this thread | | | Date | Tue, 20 Mar 2001 19:35:17 -0800 (PST) | From | Nigel Gamble <> | Subject | Re: [PATCH for 2.5] preemptible kernel |
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On Wed, 21 Mar 2001, Keith Owens wrote: > I misread the code, but the idea is still correct. Add a preemption > depth counter to each cpu, when you schedule and the depth is zero then > you know that the cpu is no longer holding any references to quiesced > structures.
A task that has been preempted is on the run queue and can be rescheduled on a different CPU, so I can't see how a per-CPU counter would work. It seems to me that you would need a per run queue counter, like the example I gave in a previous posting.
Nigel Gamble nigel@nrg.org Mountain View, CA, USA. http://www.nrg.org/
MontaVista Software nigel@mvista.com
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